On Fri, 07 Aug, at 09:37:00AM, Matt Fleming wrote:
> From: "Jonathan (Zhixiong) Zhang" <[email protected]>
>
> Table 8 of UEFI 2.5 section 2.3.6.1 defines mappings from EFI
> memory types to MAIR attribute encodings for arm64.
>
> If the physical address has memory attributes defined by EFI
> memmap as EFI_MEMORY_[UC|WC|WT], return approprate page protection
> type according to the UEFI spec. Otherwise, return PAGE_KERNEL.
>
> Reviewed-by: Catalin Marinas <[email protected]>
> Acked-by: Hanjun Guo <[email protected]>
> Signed-off-by: Jonathan (Zhixiong) Zhang <[email protected]>
> Signed-off-by: Matt Fleming <[email protected]>
> ---
> arch/arm64/include/asm/acpi.h | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
Ard Biesheuvel has brought up a concern with this patch and it's
currently under discussion here,
https://lkml.kernel.org/r/CAKv+Gu8+g3dTaNzXjSD=5GxproaHM+Eu1hLmRWp7cVrQimzbHQ@mail.gmail.com
--
Matt Fleming, Intel Open Source Technology Center
* Matt Fleming <[email protected]> wrote:
> On Fri, 07 Aug, at 09:37:00AM, Matt Fleming wrote:
> > From: "Jonathan (Zhixiong) Zhang" <[email protected]>
> >
> > Table 8 of UEFI 2.5 section 2.3.6.1 defines mappings from EFI
> > memory types to MAIR attribute encodings for arm64.
> >
> > If the physical address has memory attributes defined by EFI
> > memmap as EFI_MEMORY_[UC|WC|WT], return approprate page protection
> > type according to the UEFI spec. Otherwise, return PAGE_KERNEL.
> >
> > Reviewed-by: Catalin Marinas <[email protected]>
> > Acked-by: Hanjun Guo <[email protected]>
> > Signed-off-by: Jonathan (Zhixiong) Zhang <[email protected]>
> > Signed-off-by: Matt Fleming <[email protected]>
> > ---
> > arch/arm64/include/asm/acpi.h | 27 +++++++++++++++++++++++++++
> > 1 file changed, 27 insertions(+)
> >
>
> Ard Biesheuvel has brought up a concern with this patch and it's
> currently under discussion here,
>
> https://lkml.kernel.org/r/CAKv+Gu8+g3dTaNzXjSD=5GxproaHM+Eu1hLmRWp7cVrQimzbHQ@mail.gmail.com
Ok, I applied the patches up to this point, to tip:core/efi, to get the ball
rolling - and will push them out after testing:
8d446c8647c9 arm64/mm: Add PROT_DEVICE_nGnRnE and PROT_NORMAL_WT
b40227fbfb1f acpi, x86: Implement arch_apei_get_mem_attributes()
7bf793115dd9 efi, x86: Rearrange efi_mem_attributes()
fa5c35011a8d Revert "x86/efi: Request desired alignment via the PE/COFF headers"
248fbcd5aee0 x86/efi-bgrt: Switch pr_err() to pr_debug() for invalid BGRT
87db73aebf55 efi: Add support for EFI_MEMORY_RO attribute introduced by UEFIv2.5
Let me know when the concerns are resolved or there are other patches to add.
Thanks,
Ingo